[1] Mayo Clin, Div Pulm & Crit Care Med, Dept Internal Med, 200 First St SW, Rochester, MN 55905 USA
[2] Mayo Clin, Div Pulm & Crit Care Med, Dept Internal Med, Jacksonville, FL 32224 USA
[3] Univ Texas Southwestern Med Ctr Dallas, Dept Internal Med, Div Pulm & Crit Care Med, Dallas, TX USA
[4] Arizona Pulm Specialists Ltd, Dept Internal Med, Div Pulm & Crit Care Med, Phoenix, AZ USA
[5] Childrens Hosp, Div Cardiol, Dept Pediat, Aurora, CO USA
[6] Columbia Univ, Med Ctr, Div Cardiol, Dept Pediat, New York, NY USA
[7] Cottage Pulm Hypertens Ctr, Div Pulm & Crit Care Med, Dept Internal Med, Santa Barbara, CA USA
[8] Med Coll Wisconsin, Dept Internal Med, Div Pulm & Crit Care Med, Milwaukee, WI 53226 USA
[9] Johns Hopkins Univ, Dept Internal Med, Div Pulm & Crit Care Med, Baltimore, MD USA
[10] Louisiana State Univ, Dept Internal Med, Comprehens Pulm Hypertens Ctr, Div Pulm & Crit Care Med,Hlth Sci Ctr, New Orleans, LA USA
[11] Brown Univ, Dept Internal Med, Div Pulm & Crit Care Med, Providence, RI 02912 USA
[12] Sentara Cardiovasc Res Inst, Dept Internal Med, Div Pulm & Crit Care Med, Norfolk, VA USA
[13] Univ Calif San Francisco, Dept Internal Med, Div Cardiol, San Francisco, CA 94143 USA
[14] Univ Cincinnati, Dept Internal Med, Div Pulm & Crit Care Med, Cincinnati, OH USA
[15] Univ Colorado, Dept Internal Med, Div Pulm & Crit Care Med, Denver, CO USA
[16] Univ Iowa, Dept Internal Med, Roy J & Lucille A Carver Coll Med, Div Cardiol, Iowa City, IA 52242 USA
[17] Univ Maryland, Sch Med, Dept Internal Med, Div Cardiol, Baltimore, MD 21201 USA
[18] Univ Minnesota, Dept Internal Med, Div Cardiol, Minneapolis, MN USA
[19] Univ N Carolina, Dept Internal Med, Div Pulm & Crit Care Med, Chapel Hill, NC 27515 USA
[20] Univ Penn, Dept Internal Med, Div Pulm & Crit Care Med, Philadelphia, PA 19104 USA
[21] Univ Calif San Francisco, Dept Internal Med, Div Cardiol, San Francisco, CA 94143 USA
[22] Univ Virginia Hlth Syst, Dept Internal Med, Div Cardiol, Charlottesville, VA USA
[23] Univ Wisconsin, Dept Internal Med, Div Pulm & Crit Care, Madison, WI USA
[24] Washington Univ Barnes Jewish, Dept Internal Med, Div Pulm & Crit Care Med, St Louis, MO USA
[25] Weill Cornell Med Sch, Dept Internal Med, Div Cardiol, New York, NY USA
[26] Univ Utah, Dept Internal Med, Div Cardiol, Salt Lake City, UT 84112 USA
[27] Mayo Clin, Dept Cardiovasc Dis, Rochester, MN USA